package lab02.test32;

import java.util.HashMap;
import java.util.Map;

public class Test32 {
    public static void main(String[] args) {

        Map<String,String> map=new HashMap<>();

        map.put("id","1");
        map.put("name","张三");
        map.put("gender","男");
        map.put("age","25");
        map.put("love","爱学Java");

        for(Map.Entry<String,String>entry:map.entrySet()){

            System.out.println(entry.getKey());
            System.out.println(entry.getValue());
        }
        System.out.println("集合的大小"+map.size());


        for(Map.Entry<String,String>entry:map.entrySet()){

            if(entry.getKey().equals("age")){

                map.remove(entry.getKey());
            }
        }
        System.out.println("集合的大小"+map.size());
    }
}
